/**

 @Name：layuiAdmin 视图模块
 @Author：贤心
 @Site：http://www.layui.com/admin/
 @License：LPPL
    
 */

layui.define(['laytpl', 'layer'], function(exports) {
	var $ = layui.jquery,
		laytpl = layui.laytpl,
		layer = layui.layer,
		setter = layui.setter,
		device = layui.device(),
		hint = layui.hint()

		//对外接口
		,
		view = function(id) {
			return new Class(id);
		}

		,
		SHOW = 'layui-show',
		LAY_BODY = 'LAY_app_body'

		//构造器
		,
		Class = function(id) {
			this.id = id;
			this.container = $('#' + (id || LAY_BODY));
		};

	//加载中
	view.loading = function(elem) {
		elem.append(
			this.elemLoad = $(
				'<i class="layui-anim layui-anim-rotate layui-anim-loop layui-icon layui-icon-loading layadmin-loading"></i>')
		);
	};

	//移除加载
	view.removeLoad = function() {
		this.elemLoad && this.elemLoad.remove();
	};

	//清除 token，并跳转到登入页
	view.exit = function(callback) {
		//清空本地记录的 token
		layui.data(setter.tableName, {
			key: setter.request.tokenName,
			remove: true
		});

		//跳转到登入页
		//location.hash = '/user/login'; 
		callback && callback();
	};

	//Ajax请求
	view.req = function(options) {
		var that = this,
			success = options.success,
			error = options.error,
			request = setter.request,
			response = setter.response,
			debug = function() {
				return setter.debug ?
					'<br><cite>URL：</cite>' + options.url :
					'';
			};

		options.data = options.data || {};
		options.headers = options.headers || {};

		if (request.tokenName) {
			//自动给参数传入默认 token
			options.data[request.tokenName] = request.tokenName in options.data ?
				options.data[request.tokenName] :
				(layui.data(setter.tableName)[request.tokenName] || '');

			//自动给 Request Headers 传入 token
			options.headers[request.tokenName] = request.tokenName in options.headers ?
				options.headers[request.tokenName] :
				(layui.data(setter.tableName)[request.tokenName] || '');
		}

		delete options.success;
		delete options.error;

		return $.ajax($.extend({
			type: 'get',
			dataType: 'json',
			success: function(res) {
				var statusCode = response.statusCode;
				//只有 response 的 code 一切正常才执行 done
				if (res[response.statusName] == statusCode.ok) {
					typeof options.done === 'function' && options.done(res);
				}

				//登录状态失效，清除本地 access_token，并强制跳转到登入页
				else if (res[response.statusName] == statusCode.logout) {
					view.exit(function(){
						top.location.href = "../login.html";
					});
				}

				//其它异常
				else {
					var error = [
						'<cite>Error：</cite> ' + (res[response.msgName] || '返回状态码异常'), debug()
					].join('');
					view.error(error);
				}

				//只要 http 状态码正常，无论 response 的 code 是否正常都执行 success
				typeof success === 'function' && success(res);
			},
			error: function(e, code) {
				console.log(e, code);
				var error = [
					'请求异常，请重试<br><cite>错误信息：</cite>' + code, debug()
				].join('');
				view.error(error);

				typeof error === 'function' && error(res);
			}
		}, options));
	};

	//弹窗
	view.popup = function(options) {
		var success = options.success,
			skin = options.skin;

		delete options.success;
		delete options.skin;

		return layer.open($.extend({
			type: 1,
			title: '提示',
			content: '',
			id: 'LAY-system-view-popup',
			skin: 'layui-layer-admin' + (skin ? ' ' + skin : ''),
			shadeClose: true,
			closeBtn: false,
			success: function(layero, index) {
				var elemClose = $('<i class="layui-icon" close>&#x1006;</i>');
				layero.append(elemClose);
				elemClose.on('click', function() {
					layer.close(index);
				});
				typeof success === 'function' && success.apply(this, arguments);
			}
		}, options))
	};

	//异常提示
	view.error = function(content, options) {
		return view.popup($.extend({
			content: content,
			maxWidth: 300
				//,shade: 0.01
				,
			offset: 't',
			anim: 6,
			id: 'LAY_adminError'
		}, options))
	};


	//请求模板文件渲染
	Class.prototype.render = function(views, params) {
		var that = this,
			router = layui.router();
		views = setter.views + views + setter.engine;

		$('#' + LAY_BODY).children('.layadmin-loading').remove();
		view.loading(that.container); //loading

		//请求模板
		$.ajax({
			url: views,
			type: 'get',
			dataType: 'html',
			data: {
				v: layui.cache.version
			},
			success: function(html) {
				html = '<div>' + html + '</div>';

				var elemTitle = $(html).find('title'),
					title = elemTitle.text() || (html.match(/\<title\>([\s\S]*)\<\/title>/) || [])[1];

				var res = {
					title: title,
					body: html
				};

				elemTitle.remove();
				that.params = params || {}; //获取参数

				if (that.then) {
					that.then(res);
					delete that.then;
				}

				that.parse(html);
				view.removeLoad();

				if (that.done) {
					that.done(res);
					delete that.done;
				}

			},
			error: function(e) {
				view.removeLoad();

				if (that.render.isError) {
					return view.error('请求视图文件异常，状态：' + e.status);
				};

				if (e.status === 404) {
					that.render('template/tips/404');
				} else {
					that.render('template/tips/error');
				}

				that.render.isError = true;
			}
		});
		return that;
	};

	//解析模板
	Class.prototype.parse = function(html, refresh, callback) {
		var that = this,
			isScriptTpl = typeof html === 'object' //是否模板元素
			,
			elem = isScriptTpl ? html : $(html),
			elemTemp = isScriptTpl ? html : elem.find('*[template]'),
			fn = function(options) {
				var tpl = laytpl(options.dataElem.html());

				options.dataElem.after(tpl.render($.extend({
					params: router.params
				}, options.res)));

				typeof callback === 'function' && callback();

				try {
					options.done && new Function('d', options.done)(options.res);
				} catch (e) {
					console.error(options.dataElem[0], '\n存在错误回调脚本\n\n', e)
				}
			},
			router = layui.router();

		elem.find('title').remove();
		that.container[refresh ? 'after' : 'html'](elem.children());

		router.params = that.params || {};

		//遍历模板区块
		for (var i = elemTemp.length; i > 0; i--) {
			(function() {
				var dataElem = elemTemp.eq(i - 1),
					layDone = dataElem.attr('lay-done') || dataElem.attr('lay-then') //获取回调
					,
					url = laytpl(dataElem.attr('lay-url') || '').render(router) //接口 url
					,
					data = laytpl(dataElem.attr('lay-data') || '').render(router) //接口参数
					,
					headers = laytpl(dataElem.attr('lay-headers') || '').render(router); //接口请求的头信息

				try {
					data = new Function('return ' + data + ';')();
				} catch (e) {
					hint.error('lay-data: ' + e.message);
					data = {};
				};

				try {
					headers = new Function('return ' + headers + ';')();
				} catch (e) {
					hint.error('lay-headers: ' + e.message);
					headers = headers || {}
				};

				if (url) {
					view.req({
						type: dataElem.attr('lay-type') || 'get',
						url: url,
						data: data,
						dataType: 'json',
						headers: headers,
						success: function(res) {
							fn({
								dataElem: dataElem,
								res: res,
								done: layDone
							});
						}
					});
				} else {
					fn({
						dataElem: dataElem,
						done: layDone
					});
				}
			}());
		}

		return that;
	};

	//自动渲染数据模板
	Class.prototype.autoRender = function(id, callback) {
		var that = this;
		$(id || 'body').find('*[template]').each(function(index, item) {
			var othis = $(this);
			that.container = othis;
			that.parse(othis, 'refresh');
		});
	};

	//直接渲染字符
	Class.prototype.send = function(views, data) {
		var tpl = laytpl(views || this.container.html()).render(data || {});
		this.container.html(tpl);
		return this;
	};

	//局部刷新模板
	Class.prototype.refresh = function(callback) {
		var that = this,
			next = that.container.next(),
			templateid = next.attr('lay-templateid');

		if (that.id != templateid) return that;

		that.parse(that.container, 'refresh', function() {
			that.container.siblings('[lay-templateid="' + that.id + '"]:last').remove();
			typeof callback === 'function' && callback();
		});

		return that;
	};

	//视图请求成功后的回调
	Class.prototype.then = function(callback) {
		this.then = callback;
		return this;
	};

	//视图渲染完毕后的回调
	Class.prototype.done = function(callback) {
		this.done = callback;
		return this;
	};

	//对外接口
	exports('view', view);
});
